1. Chara and The Player (Absolute)
2. The Angel (Currently)
3. Gaster (Post Shattered)
4. Asriel (Second Phase)
5. Frisk (Pacifist Finale)
6. Amalgamates (Individually)
7. Adult Humans (Individually)
8. Asgore (No Holding Back)
9. The 6 Fallen Humans (Individually)
10. Sans (Genocide Route)
How do you know this though? We have next to ZERO info on gaster. I know this was your opinion but i think that gaster should not be here. Other than that the list looks good.
THE ANGEL IS LITERALLY 
Nuh uh
I decided just now
That’s false
WE are the angel twin
I'm talking about Undertale, not Deltarune
"The Angel, the one who has seen the surface, they shall return, and the Underground will go empty."
Can't be Chara, bc they don't do Genocide, they just kill Sans, Asgore, and Flowey.
Can't be Frisk, they don't "return", they just go to the Underground.
MAY be the Player, but we don't see the Surface until True Pacifist (and only then it's just one shot of it)
Only Asriel's left!
But we came from the surface. and YEAH, I know you were talking about Undertale. Imo it makes sense to me and sometimes the simplest answer is correct. It seemed to me when I was playing undertale that the angel was implied to be us, the player.
The Surface (UT) ≠ The Surface (IRL)
son 
i give up
eh?
the ztrongezt character iz of courze papyruz. papyruz can chooze exactly what damage he dealz
